Who is Susie?

"Susie is earnest, serious, smart and most of all kind. Susie's one major flaw is that she hates to let anyone have the last say.
Susie has a love-hate conflict with Calvin, and it's taken all of us a while to get to understand Susie's relationship with Calvin; especially Susie. I suspect Calvin has a mild crush on her that he expresses by trying to annoy her, but Susie is a bit unnerved and put off by Calvin's weirdness. This encourages Calvin to be even weirder.
She typically thinks she knows better than the rest and hates sharing her knowledge. She is poorly suited for this new teaching medium, although she would insist otherwise."

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